Polygon security bolt



FIG. 1 is a front elevation view of a split security bolt showing my new design;

FIG. 2 is a top plan view of FIG. 1 rotated right 90 degrees; and,

FIG. 3 is a bottom plan view of FIG. 1 rotated left 90 degrees.

The broken lines in the drawings illustrate portions of the polygon security bolt and form no part of the claimed design. 

CLAIM The ornamental design for a polygon security bolt, as shown and described. 